Potassium sulfide represented by the chemistry formula K2S is a compound of potassium and sulfur the is moderately dissolve in mountain <1>. The is deliquescent and also may spontaneously ignite in air. It is a reduce agent and an ionic link <4>.

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Potassium Sulfide

Potassium Sulfide Identification

CAS Number1312-73-8 <1>
PubChem CID20072150 <3>
ChemSpider ID142491 <2>
EC Number215-197-0 <1>

Composition and also Synthesis

Potassium sulfide deserve to be all set by first treating potassium hydroxide to excess hydrogen sulfide to type potassium hydrosulfide (KHS). Further treatment that KHS v the exact same amount the potassium hydroxide generates potassium sulfide <9>.

KOH + H2S = KHS + H2O


Potassium Sulfide Formula

Properties and Characteristics that Potassium Sulfide

General Properties

Molar mass/molecular weight71.158 g/mol <3>

Physical Properties

Color/appearanceWhite come yellow powder <4>
Melting point/freezing point840°C, 1544°F <1>
Boiling point912°C, 1674°F <1>
Density 1.80 g cm-3 <1>
State of matter at room temperature (normal phase)Solid <1>

Chemical Properties

Solubility in waterN/A <1>
pH>7 (basic) <5>

Atomic Properties

Crystal structureTetrahedral <6>


Potassium Sulfide Structure


Lewis Dot structure for Potassium Sulfide

Prominent reactions of K2S

Potassium sulfide reacts through cobalt iii bromide to develop cobalt iii sulfide and also potassium bromide <10>.

3K2S + 2CoBr3 = Co2S3 + 6KBr

Potassium sulfide reacts v dilute hydrochloric mountain to create potassium chloride and also hydrogen sulfide <11>.

K2S + 2HCl = 2 KCl + H2S

It reaction with focused sulfuric acid to give potassium bisulfate, sulfur dioxide, sulfur and water <13>

K2S + 3H2SO4 = 2KHSO4 + SO2 + S + 2H20

The link reacts v silver nitrate to type aqueous potassium nitrate and silver sulfide precipitate <12>.

K2S + 2AgNO3 = 2KNO3 + Ag2S

Potassium Sulfide Uses

In pyrotechnics <7>.As a reagent in analysis chemistry <4>.As a depilatory and medicine <4>.

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Is that Dangerous

It may reason a fire hazard, for this reason precautions need to be taken no to lug it in call with air. In the type of flour or dust, it is explosive. Ingestion, inhalation and skin call may an outcome in significant injury and also even death. It likewise harmfully affects the eyes and skin causing eye damage and also skin burns. Thus all contact should it is in avoided. That emits toxicity fumes if heated to decomposition <4>. That is that a corrosive nature and poisonous because that the environment <8>.